Kei Inoo (伊野尾 慧, Inoo Kei, born June 22, 1990)^[1] is a Japanese singer, actor, and member of Hey! Say! JUMP. He is under the management of Johnny & Associates. He was born in Saitama Prefecture.^[2]

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On September 23, 2001, he entered Johnny & Associates as a trainee. He later became a member of the Johnny's Jr. group J.J. Express. In 2007, he debuted as a member of Hey! Say! JUMP. He graduated from Meiji University with a degree in architecture in 2013.^[3] He plays the keyboard during the group's live shows.

He joined Johnny & Associates as a Johnny's Jr. He appeared regularly on the show, Ya-Ya-yah, as well as J&A show, Shounen Club. He later became a part of the Johnny's Jr. group, J.J. Express with Yuya Takaki, Daiki Arioka, and Yuto Nakajima. He debuted on September 24, 2007, as a member of Hey! Say! JUMP.

Since then, Inoo has been cast in numerous dramas and became a frequent guest on Tensai! Shimura Dobutsuen and a regular on Mezamashi TV.^[4] He also appeared on the Saturday afternoon variety show, Meringue no Kimochi.^[5]

He was cast as the main role in the live-action movie adaptation of the manga Peach Girl as Okayasu Kairi which was released in 2017 and marked his film debut.^[6]

He has a second-class small boat pilot license and a scuba diving license.^[7] Inoo graduated from the Department of Architecture, Faculty of Science and Engineering, Meiji University in 2013.^[3][8]

Inoo is distantly related to Jesse of SixTONES, who is also under Johnny & Associates.^[9]